Novel outer rotor brushless DC motor assembly tool

Abstract

The utility model discloses a novel outer rotor direct current brushless motor assembly tool, including operation platform, its characterized in that: be provided with lower mould in operation platform, be provided with the cavity of can accommodate rotor in lower mould, be provided with upper mould through the screw joint of lower mould, the central through -hole of can let stator pass through is arranged in the upper mould middle part, the position of upper mould lower end surface and rotor upper end surface corresponding is provided with the compression ring, when the compression ring top pressure rotor upper end surface of upper mould and lower mould screwing. The utility model constructs simple, can stator and rotor quick installation and can effectively reduce the collision of the magnetic attraction result in, thereby improve installation efficiency and installation quality.

Description

Technical Field

[0001] This utility model relates to the field of assembly tooling technology for external rotor brushless DC motors, specifically to a novel assembly tooling for external rotor brushless DC motors. Background Technology

[0002] The existing external rotor brushless DC motor structure mainly includes a motor stator and a rotor. The rotor contains strong magnetic tiles. During the assembly of the stator and rotor, the strong magnetic tiles of the rotor will attract and collide with the stator, which can easily damage the product. Moreover, the assembly process can easily cause hand pinching accidents, making operation dangerous. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a new type of external rotor brushless DC motor assembly fixture with a simple structure, which can quickly install the stator and rotor and effectively reduce collisions caused by magnetic attraction, thereby improving installation efficiency and quality.

[0004] To achieve the above objectives, the present invention adopts the following solution: a novel external rotor brushless DC motor assembly fixture, comprising an operating table, characterized in that: a lower mold is provided on the operating table, a cavity for accommodating the rotor is provided in the lower mold, an upper mold is screwed onto the lower mold via a screwing mechanism, a central through hole for the stator to pass through is provided in the middle of the upper mold, and a pressure ring is provided at a position corresponding to the upper end face of the upper mold and the upper end face of the rotor, wherein the pressure ring presses against the upper end face of the rotor when the upper mold and the lower mold are screwed together.

[0005] As another improvement to the assembly fixture for the external rotor brushless DC motor of this utility model, the screwing mechanism includes positioning protrusions spaced apart on the outer wall of the lower mold, and a buckle is provided on the lower end face of the upper mold at a position corresponding to the positioning protrusions, and the buckle is screwed onto the positioning protrusions.

[0006] As another improvement to the assembly fixture for the external rotor brushless DC motor of this utility model, an mounting hole is provided on the upper mold, and a connecting hole is provided at the corresponding position of the buckle and the mounting hole. The buckle is fixed on the upper mold by a first bolt and a first nut provided in the mounting hole and the connecting hole.

[0007] As another improvement to the assembly fixture for the external rotor brushless DC motor described in this utility model, the buckle is integrally formed with the upper mold.

[0008] As another improvement to the assembly fixture for the external rotor brushless DC motor of this utility model, a first assembly hole is provided on the operating table, and a second assembly hole is provided on the lower mold at a position corresponding to the first assembly hole. The lower mold is fixed to the lower mold by a second bolt and a second nut provided in the first and second assembly holes.

[0009] As another improvement to the assembly fixture for the external rotor brushless DC motor described in this utility model, a positioning step is provided in the first assembly hole, and the end of the second bolt presses against the positioning step.

[0010] As another improvement to the assembly fixture for the external rotor brushless DC motor described in this utility model, an auxiliary installation mechanism is provided on the operating table to enable the stator to be accurately installed in the rotor.

[0011] As another improvement to the assembly fixture for the external rotor brushless DC motor of this utility model, the auxiliary installation mechanism includes a support frame set on the operating table, a movable frame movably set on the support frame, a fixed seat set at a position corresponding to the center of the lower mold on the movable frame, and a fixing mechanism set on the fixed seat to fix the central shaft of the stator.

[0012] As another improvement to the assembly fixture for the external rotor brushless DC motor of this utility model, the fixing mechanism includes a central circular hole provided on the fixing seat, a locking transverse hole connected to the central circular hole provided on the side wall of the fixing seat, a locking bolt provided in the locking transverse hole, and a knob provided at the outer end of the locking bolt.

[0013] As another improvement to the assembly fixture for the external rotor brushless DC motor of this utility model, the support frame includes support cylinders spaced apart on the operating table, the movable frame includes movable sleeves sleeved on the outer wall of the support cylinders, a connecting crossbar is provided between the two movable sleeves, a connecting diagonal tie rod is provided between the movable sleeves and the fixed seat, and a return spring is provided on the outer wall of the support cylinders between the movable sleeves and the operating table.

[0014] In summary, the advantages of this utility model compared to the prior art are as follows: This utility model has a simple structure. The lower mold is fixed on the operating table. After the rotor part is placed into the tooling, the upper mold with a buckle is rotated and clamped to the lower mold, fixing the stator so that it will not move. Then, the rotor part is aligned with the hollow part and placed into the stator. Since the stator and rotor are attracted to each other, the operator's hand cannot be put in, ensuring the operator's safety while also ensuring that the product will not be magnetically attracted and collide, thus improving quality. It is simple and easy to operate, and is also conducive to mass production. Attached Figure Description

[0015] Figure 1 This is a perspective view of the first embodiment of the present invention.

[0016] Figure 2 for Figure 1 A cross-sectional schematic diagram.

[0017] Figure 3for Figure 1 A schematic diagram of its breakdown.

[0018] Figure 4 This is a perspective view of the second embodiment of the present invention.

[0019] In the diagram: 1. Operating table; 2. Lower mold; 3. Rotor; 4. Cavity; 5. Screw-on mechanism; 51. Positioning protrusion; 52. Buckle; 53. Mounting hole; 54. Connecting hole; 55. First bolt; 56. First nut; 6. Upper mold; 7. Stator; 8. Central through hole; 9. Pressure ring; 10. First assembly hole; 11. Second assembly hole; 12. Second bolt; 13. Second nut; 14. Positioning step; 15. Auxiliary installation mechanism; 151. Support frame; 152. Movable frame; 1521. Movable sleeve; 1522. Connecting crossbar; 1523. Connecting diagonal tie rod; 153. Fixed seat; 16. Fixing mechanism; 161. Central circular hole; 162. Locking bolt; 163. Knob; 17. Positioning hole; 18. Limiting hole; 19. Return spring. Detailed Implementation

[0020] The above-mentioned and other technical features and advantages of this utility model will be described in more detail below with reference to the accompanying drawings.

[0021] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0022] It should be noted that in the description of this utility model, the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0023] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] like Figure 1-4As shown, a novel external rotor brushless DC motor assembly fixture includes an operating table 1, a lower mold 2 is provided on the operating table 1, a cavity 4 is provided in the lower mold 2 to accommodate a rotor 3, an upper mold 6 is screwed onto the lower mold 2 by a screwing mechanism 5, a central through hole 8 is provided in the middle of the upper mold 6 to allow the stator 7 to pass through, and a pressure ring 9 is provided at a position corresponding to the upper end face of the rotor 3 on the lower end face of the upper mold 6. When the upper mold 6 and the lower mold 2 are screwed together, the pressure ring 9 presses against the upper end face of the rotor 3.

[0025] In operation, the outer rotor 3 is first precisely placed into the dedicated cavity 4 of the lower mold 2, where it is reliably positioned by its inner wall. The upper mold 6 is then screwed onto the lower mold 2, at which point the pressure ring 9 presses against the upper end face of the rotor 3. As the tightening action is completed, the pressure ring 9 applies reliable and uniform axial pressure to the upper end face of the rotor 3. This tightening action ensures that the rotor 3 is always firmly held on the bottom positioning surface of the lower mold cavity 4 during the process of inserting the stator 7 into the center of the rotor 3, preventing accidental movement, skewness, or floating during assembly. This ensures the uniformity of the air gap between the stator 7 and the rotor 3 and the coaxiality of the overall assembly, ultimately achieving high-quality, highly consistent motor assembly. The rotor is then aligned with the inner cavity and placed into the stator. Because the stator and rotor attract each other, the operator's hand cannot be inserted, ensuring operator safety while preventing magnetic attraction and collisions, thus improving quality. This simple and easy-to-operate method is also beneficial for mass production.

[0026] The screw-on mechanism 5 described in this utility model can enable threaded connection or snap-on connection.

[0027] In one embodiment of the screw-on mechanism 5 of this utility model, the screw-on mechanism 5 includes positioning protrusions 51 spaced apart on the outer wall of the lower mold 2, and a buckle 52 is provided on the lower end face of the upper mold 6 at a position corresponding to the positioning protrusions 51, and the buckle 52 is screwed onto the positioning protrusions 51.

[0028] In the first embodiment of the buckle 52 in this utility model, the buckle 52 and the upper mold 6 are detachably disposed. Specifically, the upper mold 6 is provided with a mounting hole 53, and a connecting hole 54 is provided at a corresponding position of the buckle 52 and the mounting hole 53. The buckle 52 is fixed to the upper mold 6 by a first bolt 55 and a first nut 56 disposed in the mounting hole 53 and the connecting hole 54. The advantage of this embodiment is that the buckle 52 can be disassembled and replaced when it wears out.

[0029] In the second embodiment of the buckle 52 of this utility model, the buckle 52 is integrally formed with the upper mold 6.

[0030] In this invention, a first assembly hole 10 is provided on the operating table 1, and a second assembly hole 11 is provided on the lower mold 2 at a corresponding position to the first assembly hole 10. The lower mold 2 is fixed to the lower mold 2 by a second bolt 12 and a second nut 13 provided in the first assembly hole 10 and the second assembly hole 11. A positioning step 14 is provided in the first assembly hole 10, and the end of the second bolt 12 presses against the positioning step 14.

[0031] See Figure 4 In a second embodiment of this utility model, an auxiliary installation mechanism 15 is provided on the operating table 1 to enable the stator 7 to be accurately installed in the rotor 3. The auxiliary installation mechanism 15 includes a support frame 151 mounted on the operating table 1, a movable frame 152 movably mounted on the support frame 151, a fixed seat 153 positioned at a location corresponding to the center of the lower mold 2 on the movable frame 152, and a fixing mechanism 16 mounted on the fixed seat 153 to fix the central shaft of the stator 7. The fixing mechanism 16 includes a central circular hole 161 on the fixed seat 153, a locking transverse hole communicating with the central circular hole 161 on the side wall of the fixed seat 153, a locking bolt 162 inside the locking transverse hole, and a knob 163 at the outer end of the locking bolt 162.

[0032] The support frame 151 of this utility model includes support cylinders spaced apart on the operating table 1. The movable frame 152 includes a movable sleeve 1521 sleeved on the outer wall of the support cylinder. A connecting crossbar 1522 is provided between the two movable sleeves 1521. A connecting diagonal tie rod 1523 is provided between the movable sleeve 1521 and the fixed seat 153. A return spring 19 is provided on the outer wall of the support cylinder between the movable sleeve 1521 and the operating table 1.

[0033] The auxiliary installation mechanism of this utility model ensures that the central shaft of the stator 7 is accurately positioned, stably oriented, and reliably fixed during the assembly process, so that it can be inserted vertically, coaxially, and smoothly into the center of the rotor 3 located in the cavity 4 of the lower mold 2.

[0034] The movable sleeve 1521 of this utility model cooperates with the support cylinder to enable the movable frame to move vertically relative to the support frame 151, allowing the fixed seat 153 and the fixing mechanism 16 of the fixed stator 7 to be adjusted in the vertical direction, so as to facilitate the operator to place the stator and lower it smoothly during the assembly process.

[0035] In this invention, a positioning hole 17 is provided on the movable sleeve 1521, and a limiting hole 18 is provided at a corresponding position on the lower part of the supporting cylinder. A positioning pin is inserted into the positioning hole 17 and the limiting hole 18. In this invention, when the stator moves down to the predetermined position, the positioning pin inserted into the positioning hole 17 and the limiting hole 18 overcomes the elastic force of the return spring 19, making it easy to loosen the locking bolt 162.

[0036] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A novel assembly fixture for an external rotor brushless DC motor, comprising an operating table (1), characterized in that: A lower mold (2) is provided on the operating table (1). A cavity (4) for accommodating the rotor (3) is provided in the lower mold (2). An upper mold (6) is screwed onto the lower mold (2) by a screwing mechanism (5). A central through hole (8) for the stator (7) to pass through is provided in the middle of the upper mold (6). A pressure ring (9) is provided at a position corresponding to the upper end face of the upper mold (6) and the upper end face of the rotor (3). When the upper mold (6) and the lower mold (2) are screwed together, the pressure ring (9) presses against the upper end face of the rotor (3).

2. The novel external rotor brushless DC motor assembly fixture according to claim 1, characterized in that: The screwing mechanism (5) includes positioning protrusions (51) spaced apart on the outer wall of the lower mold (2), and a buckle (52) is provided on the lower end face of the upper mold (6) at a position corresponding to the positioning protrusions (51), and the buckle (52) is screwed onto the positioning protrusions (51).

3. The novel external rotor brushless DC motor assembly fixture according to claim 2, characterized in that: An mounting hole (53) is provided on the upper mold (6), and a connecting hole (54) is provided at the corresponding position of the buckle (52) and the mounting hole (53). The buckle (52) is fixed on the upper mold (6) by a first bolt (55) and a first nut (56) provided in the mounting hole (53) and the connecting hole (54).

4. The novel external rotor brushless DC motor assembly fixture according to claim 2, characterized in that: The buckle (52) is integrally formed with the upper mold (6).

5. The novel external rotor brushless DC motor assembly fixture according to claim 2, characterized in that: A first assembly hole (10) is provided on the operating table (1), and a second assembly hole (11) is provided on the lower mold (2) at the corresponding position of the first assembly hole (10). The lower mold (2) is fixed on the lower mold (2) by a second bolt (12) and a second nut (13) provided in the first assembly hole (10) and the second assembly hole (11).

6. The novel external rotor brushless DC motor assembly fixture according to claim 5, characterized in that: A positioning step (14) is provided in the first assembly hole (10), and the end of the second bolt (12) presses against the positioning step (14).

7. The novel external rotor brushless DC motor assembly fixture according to any one of claims 1-6, characterized in that: An auxiliary installation mechanism (15) is provided on the operating table (1) to enable the stator (7) to be accurately installed in the rotor (3).

8. The novel external rotor brushless DC motor assembly fixture according to claim 7, characterized in that: The auxiliary installation mechanism (15) includes a support frame (151) set on the operating table (1), a movable frame (152) movably set on the support frame (151), a fixed seat (153) set at the position corresponding to the center of the lower mold (2) on the movable frame (152), and a fixing mechanism (16) that can fix the central axis of the stator (7) set on the fixed seat (153).

9. The novel external rotor brushless DC motor assembly fixture according to claim 8, characterized in that: The fixing mechanism (16) includes a central circular hole (161) provided on the fixing seat (153), a locking horizontal hole communicating with the central circular hole (161) provided on the side wall of the fixing seat (153), a locking bolt (162) provided in the locking horizontal hole, and a knob (163) provided at the outer end of the locking bolt (162).

10. The novel external rotor brushless DC motor assembly fixture according to claim 9, characterized in that: The support frame (151) includes support cylinders spaced apart on the operating table (1), the movable frame (152) includes movable sleeves (1521) sleeved on the outer wall of the support cylinders, a connecting crossbar (1522) is provided between the two movable sleeves (1521), a connecting diagonal tie rod (1523) is provided between the movable sleeves (1521) and the fixed seat (153), and a return spring (19) is provided on the outer wall of the support cylinder between the movable sleeves (1521) and the operating table (1).

Images